NTP Clock is a Simple Network Time Protocol (SNTP) client which uses NTP or SNTP time servers on the internet or your local LAN to compute the current time. These servers maintain time with a very high accuracy, sometimes with an error of just a few microseconds. NTP Clock uses the information it receives from these servers to compute the current time as well as the offset between the "NTP clock" and the "device clock". With a reasonably fast network connection, such as Wi-Fi or LTE/4G, an accuracy of a few milliseconds is typically achieved.
NTP Clock can be installed on any device running Windows 10 Mobile.
NTP Clock is available free of charge from the Microsoft Store.